Public utilities provide electric, gas, water or telephone service to customers in a specified area. Utilities have a duty to provide safe and adequate service on reasonable terms to anyone who lives within the service area on without discriminating between customers. Because most utilities operate in near monopolistic conditions, they can be heavily regulated by local, state, and federal authorities. Generally, the local and state agencies are called Public Service Commissions (PSC) or Public Utility Commissions (PUC). Municipal Utilities and Rural Electric Cooperatives may be unregulated though.
Sioux Falls is the largest city in the U.S. state of South Dakota. Sioux Falls is the county seat of Minnehaha County, and also extends into Lincoln County to the south. It anchors the fastest growing metro area in the Midwest, with a total increase of 22% since 2000. As of the 2000 census, Sioux Falls had a population of 123,975 and a metropolitan area population of 187,093. However, a 2008 Census Bureau estimate shows Sioux Falls to have grown to a population of 154,997, with a metropolitan population of 232,930. It is also the primary city of the Sioux Falls-Sioux City Designated Market Area (DMA), a larger media market region that covers parts of four states and has a population of 1,043,450. Chartered in 1856 on the banks of the Big Sioux River, the city is situated on the prairie of the Great Plains at the junction of Interstate 90 and Interstate 29. Sioux Falls is a regional center of urban and rural interaction.